Absorption spectrometry is useful for analysing metals in the samples. But it's not recomended for non metals though. I know that it's difficult to analyse non metals because most of them absorbs in the same wavelenght as atmosphere (oxygen). Anyway, I would like to know if ionization energy plays a role in this analytical technique. I can't find any strong source.
Post Closed as "Needs details or clarity" by Mathew Mahindaratne, Todd Minehardt, Jannis Andreska, Safdar Faisal, F'x